Results 41 to 50 of about 213,770 (341)
Acoustic Emission from Paper Fracture [PDF]
Physical Review Letters, 2002 We report tensile failure experiments on paper sheets. The acoustic emission energy and the waiting times between acoustic events follow power-law distributions. This remains true while the strain rate is varied by more than two orders of magnitude. The energy statistics has the exponent $ \sim 1.25 \pm 0.10$ and the waiting times the exponent $ \sim
Salminen, L.I. +2 more
openaire +4 more sources
Acoustic emission frequency discrimination [PDF]
, 1988 In acoustic emission nondestructive testing, broadband frequency noise is distinguished from narrow banded acoustic emission signals, since the latter are valid events indicative of structural flaws in the material being examined. This is accomplished by
Graham, Lloyd J., Sugg, Frank E.
core +1 more source
Power Laws, Precursors and Predictability During Failure
, 2004 We investigate the dynamics of a modified Burridge-Knopoff model by introducing a dissipative term to mimic the bursts of acoustic emission (AE) from rock samples.
Bufe C. G. +16 more
core +3 more sources
Advanced Functional Materials, EarlyView.The dielectric properties of clays are studied on the level of individual monolayers and functional double stacks. The material breakdown characteristics and charge storage performance are analyzed. For illustration, a defined charge pattern representing a cuneiform character is produced, written into a microscopic clay tile, referencing the origins of
Sebastian Gödrich +6 more
wiley +1 more source
Mutation effect of acoustic and electromagnetic emissions of hard rock impact failure
International Journal of Distributed Sensor Networks, 2019 To reveal acoustic emission and electromagnetic emission effects during hard rock impact failure is a crucial issue for monitoring and warning rockburst risk induced by hard roof fracture and fall.
Yang Liu, Cai-Ping Lu, Heng Zhang
doaj +1 more source
Quick release acoustic sensor holding fixture [PDF]
, 1972 Quick-release spring holder secures acoustic sensor to test material surface eliminating adhesive bonding to test material and achieving acoustic emission evaluation from tensile tests.
Mcmahon, W., Scherba, E. S.
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Direct observation of dynamic surface acoustic wave controlled carrier injection into single quantum posts using phase-resolved optical spectroscopy [PDF]
, 2010 A versatile stroboscopic technique based on active phase-locking of a surface acoustic wave to picosecond laser pulses is used to monitor dynamic acoustoelectric effects.
Kim, H. +7 more
core +2 more sources
Advanced Functional Materials, EarlyView.Covalent organic frameworks (COFs) with metals have been recognized as versatile platforms for photocatalytic CO2 reduction (CO2PRR). Herein, an overview of metal integration strategies for COFs is systematically summarized. Regulatory mechanisms and structure–activity relationships between metal integration and COF‐based CO2PRR are emphasized.
Jie He +5 more
wiley +1 more source
Research of Intelligent Acoustic Emission Instrument
Gong-kuang zidonghua, 2011 In view of problems that current acoustic emission instruments have only collection function of acoustic emission data, but no function of data processing and analysis, the paper proposed a design scheme of an intelligent acoustic emission instrument ...
YUAN Chen +5 more
doaj
Multi-scale Modeling Approach to Acoustic Emission during Plastic Deformation
, 2011 We address the long standing problem of the origin of acoustic emission commonly observed during plastic deformation. We propose a frame-work to deal with the widely separated time scales of collective dislocation dynamics and elastic degrees of freedom ...
Ananthakrishna, G., Kumar, Jagadish
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